my_str = "niwraD，好你，末周"

# 倒序字符串 切片取出
result1 = my_str[::-1][6::]
print(result1)


# 切片取出 倒序字符串
result2 = my_str[:6:][::-1]
print(result2)


# split分隔 取出 倒序字符串
result3 = my_str.split("，")[0][::-1]
print(result3)